CreateQuery x (children 3)
 Identifier x
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration i (children 1)
    DataType Tuple (children 1)
     ExpressionList
   ColumnDeclaration j (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Tuple (children 1)
       ExpressionList
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
